#66CFFB#66CFFB

#66CFFB is a light, moderate cyan. Relative luminance 0.544; OKLCH L 80.9% C 0.115 H 228.1°. Best body text is #000000 at 11.88:1 contrast (WCAG AA passes).

Color values

HEX	#66CFFB
RGB	rgb(102, 207, 251)
HSL	hsl(198, 95%, 69%)
HSV	hsv(198, 59%, 98%)
CMYK	cmyk(59.4%, 17.5%, 0%, 1.6%)
CIE-LAB	lab(78.70, -17.92, -30.72)
CIE-LCH	lch(78.70, 35.57, 239.74°)
OKLab	oklab(80.9% -0.0768 -0.0857)
OKLCH	oklch(80.9% 0.115 228.1)
XYZ	xyz(45.1981, 54.4110, 99.3685)
Luminance	0.5442 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CFFB #FB9266

analogous

#66FBDC #66CFFB #6685FB

triadic

#66CFFB #FB66CF #CFFB66

tetradic

#66CFFB #DC66FB #FB9266 #85FB66

square

#66CFFB #DC66FB #FB9266 #85FB66

split-complementary

#66CFFB #FB6685 #FBDC66

monochromatic

#06A0E1 #2ABCF9 #66CFFB #A2E2FD #DDF4FE

Accessibility & contrast

On white

1.77

#66CFFB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.88

#66CFFB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CFFB

11.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CFFB	#FFFFFF	#000000	##000000
##66CFFB	1.00	1.77	11.88	11.88
#FFFFFF	1.77	1.00	21.00	21.00
#000000	11.88	21.00	1.00	1.00
##000000	11.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B8CCFD

Deuteranopia (green-blind)

#A3BCFA

Tritanopia (blue-blind)

#00DCDD

Achromatopsia (no color)

#C3C3C3

Design tokens & code

CSS

--color: #66cffb;
/* rgb */ color: rgb(102, 207, 251);
/* oklch */ color: oklch(80.9% 0.115 228.1);

Tailwind

colors: {
  custom: {
    50: '#9eddfc',
    500: '#66cffb',
    950: '#000000',
  },
}

SCSS

$custom: #66cffb;
$custom-light: #9eddfc;
$custom-dark: #000000;

JSON

{
  "hex": "#66cffb",
  "rgb": {
    "r": 102,
    "g": 207,
    "b": 251
  },
  "hsl": {
    "h": 197.718,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.80896,
    "c": 0.11504,
    "h": 228.1
  },
  "luminance": 0.54415
}

Semantic roles & 50–950 ramp

primary

#66CFFB

secondary

#D56130

accent

#4400E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#101517

muted

#808485

Preview Lab

Preview with #66CFFB

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →